<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>弹出hello</title>
    <script src="/js/jQuery3.6.0.js" type="text/javascript"></script>
</head>
<body>
<button>弹出Hello</button>
<script type="text/javascript">
    $('button').click(function () {
        alert("Hello");
    })
</script>
</body>
</html>